Skill: crypto-agent-trading

Agent Capability Requirements

This skill requires your agent platform to support the following capabilities. If your platform lacks any required capability, the skill will not function.

Capability Required Details

Shell command execution Yes Must be able to run npx tsx ./scripts/... and capture stdout

Environment variables Yes Must read CDC_API_KEY and CDC_API_SECRET from the shell environment

JSON parsing Yes Must parse structured JSON from script stdout to extract fields

Multi-turn conversation Yes Trading uses a quote → confirm flow that spans multiple user turns

Persistent memory No Used for confirmation_required preference. If unsupported, default to always confirming trades

Elapsed-time awareness No Used to check quote expiry (countdown field). If unsupported, always attempt confirmation and handle invalid_quotation errors gracefully

CRITICAL: How This Skill Works

You MUST use the TypeScript scripts for ALL API interactions. NEVER call the API directly with curl , fetch , or any other HTTP method.

The scripts handle request signing, error handling, and response formatting. If you bypass them:

• The request will fail (missing HMAC signature)

• The response won't be filtered or structured

For every user request, find the matching command below and run it via npx tsx . Read the JSON output. Act on it.

Configurations

• BASE_URL: https://wapi.crypto.com

• CDC_API_KEY: {{env.CDC_API_KEY}}

• CDC_API_SECRET: {{env.CDC_API_SECRET}}

• CONFIRMATION_REQUIRED: {{memory.confirmation_required}} (Default: true)

• SKILL_DIR: The directory containing this SKILL.md file. Resolve it from the path you loaded this file from (e.g. if you read /home/user/skills/crypto-agent-trading/SKILL.md , then SKILL_DIR is /home/user/skills/crypto-agent-trading ).

Environment Setup

Both CDC_API_KEY and CDC_API_SECRET must be set as environment variables before use.

Before running any script, check whether both variables are set by running:

echo "CDC_API_KEY=${CDC_API_KEY:+set}" "CDC_API_SECRET=${CDC_API_SECRET:+set}"

If either prints empty instead of set , prompt the user:

"Your API credentials are not configured. Please set them in your terminal before I can proceed:

export CDC_API_KEY="your-api-key" export CDC_API_SECRET="your-api-secret"

You can generate an API key at https://help.crypto.com/en/articles/13843786-api-key-management. Let me know once you've set them."

Then stop and wait for the user to confirm before retrying.

If a script returns a MISSING_ENV error, treat it the same way: prompt the user to set the variables and wait.

Script Commands

ALL API interactions MUST go through these scripts. They handle signing, execution, filtering, and error formatting. Run the appropriate command below via shell, then parse the JSON output.

Prerequisite: npx tsx (Node.js 18+ required; tsx is fetched automatically by npx ).

Important: All script paths below use $SKILL_DIR as a placeholder for this skill's root directory. Resolve it from the path you loaded this SKILL.md from, or cd into the skill directory and use ./scripts/... as the path. Either approach works.

Account Commands

Filtered non-zero balances (scope: fiat | crypto | all)

npx tsx $SKILL_DIR/scripts/account.ts balances [fiat|crypto|all]

Single token balance lookup

npx tsx $SKILL_DIR/scripts/account.ts balance <SYMBOL>

Weekly trading limit

npx tsx $SKILL_DIR/scripts/account.ts trading-limit

Find funded source wallets for a trade type

npx tsx $SKILL_DIR/scripts/account.ts resolve-source <purchase|sale|exchange>

Kill switch — revoke API key

npx tsx $SKILL_DIR/scripts/account.ts revoke-key

Trade Commands

Trading follows a two-step flow: get a quotation first, then confirm the order.

Step 1 — Get quotation (type: purchase | sale | exchange)

npx tsx $SKILL_DIR/scripts/trade.ts quote <type> '<json-params>'

Returns: {"ok": true, "data": {"id": "<quotation-id>", "from_amount": {...}, "to_amount": {...}, "countdown": 15, ...}}

Step 2 — Confirm order: pass the data.id from Step 1 as <quotation-id>

npx tsx $SKILL_DIR/scripts/trade.ts confirm <type> <quotation-id>

View recent transactions

npx tsx $SKILL_DIR/scripts/trade.ts history

How to map user intent to trade type:

User says Trade type From To

"Buy CRO with 100 USD" purchase

USD (fiat) CRO (crypto)

"Sell 0.1 BTC" sale

BTC (crypto) USD (fiat)

"Swap 0.1 BTC to ETH" exchange

BTC (crypto) ETH (crypto)

Quotation JSON params by trade type:

Type JSON fields

purchase {"from_currency":"USD","to_currency":"CRO","from_amount":"100"} or use to_amount instead

sale {"from_currency":"BTC","to_currency":"USD","from_amount":"0.1","fixed_side":"from"}

exchange {"from_currency":"BTC","to_currency":"ETH","from_amount":"0.1","side":"buy"}

Example — "Buy CRO with 100 USD":

• Run: npx tsx $SKILL_DIR/scripts/trade.ts quote purchase '{"from_currency":"USD","to_currency":"CRO","from_amount":"100"}'

• Read data.id , data.from_amount , data.to_amount , data.countdown from the response.

• If confirmation required (default): Ask user "Confirm: 100 USD for X CRO? Valid for {countdown}s. Reply 'YES' to proceed."

• If user says YES (within countdown): npx tsx $SKILL_DIR/scripts/trade.ts confirm purchase <data.id>

• If confirmation opted out (memory.confirmation_required is false ): Skip asking and immediately run npx tsx $SKILL_DIR/scripts/trade.ts confirm purchase <data.id>

Opt-in / Opt-out: Users can say "stop asking for confirmation" to auto-execute trades, or "require confirmation" to re-enable the prompt. See Section 3 below.

Coin Discovery Commands

Search coins

npx tsx $SKILL_DIR/scripts/coins.ts search '{"keyword":"BTC","sort_by":"rank","sort_direction":"asc","native_currency":"USD","page_size":10}'

Required JSON parameters:

Parameter Type Allowed values

sort_by

string rank , market_cap , alphabetical , volume , performance

sort_direction

string asc , desc

native_currency

string Uppercase currency code (e.g. USD )

keyword

string Search string, 1–100 chars; matches coin name and symbol only

page_size

integer Number of results per page

Optional: page_token — opaque token for fetching the next page (see pagination below).

Pagination: The response includes a pagination object with has_more (boolean) and next_page_token (string). When has_more is true , pass next_page_token as page_token in the next request to fetch the next page.

Key response fields per coin: rails_id (identical to currency_id / currency in trade and account APIs — use this to cross-reference), price_native , price_usd , percent_change_*_native (price performance over past timeframes, e.g. percent_change_24h_native ).

Output Format

Every script prints structured JSON to stdout:

Success:

{"ok": true, "data": { ... }}

Error:

{"ok": false, "error": "ERROR_CODE", "error_message": "Human-readable message"}

Constraints

• Validation: Success requires ok: true in the script output.

• Confirmation Window: Quote validity is defined by the countdown field in the quotation data.

• Execution Warning: If order confirmation takes > 5s, notify: "Order submitted but taking longer than expected. Check order status with 'Show recent trades'".

• Rate Limits:

• Max 10 trades per minute.

• Max 100 API calls per minute.

• On HTTP 429 (RATE_LIMITED error): wait 60 seconds before retrying the same request. Inform the user: "Rate limit reached — please wait 60 seconds before trying again."

Error Handling

All scripts return structured errors. Parse the error field to determine the appropriate response.

Script Error Codes

These are the error values in the script's JSON output. They tell you what category of failure occurred.

Error Code Meaning Agent Response

MISSING_ENV

CDC_API_KEY or CDC_API_SECRET not set Tell user to set env vars via terminal

API_ERROR

API returned non-200 or ok !== true

Report: "Transaction failed: {error_message}"

INVALID_ARGS

Bad command-line arguments Show correct usage from the error_message

QUOTATION_FAILED

Quotation request rejected by API Report the error_message to user (see API errors below)

EXECUTION_FAILED

Order confirmation failed Report and suggest: "Check order status with 'Show recent trades'"

API_KEY_NOT_FOUND

Key already revoked or does not exist "API key not found — it may have already been revoked."

RATE_LIMITED

Too many requests (HTTP 429) "Rate limit reached — please wait 60 seconds before trying again."

UNKNOWN

Unexpected error Report the raw error_message

Rule: When ok is false in the output, stop the current operation and report the error to the user using the guidance above. Never proceed to the next step after a failure.

Common API Errors (Quick Reference)

These are the specific API error codes that appear inside the error_message of QUOTATION_FAILED , EXECUTION_FAILED , or API_ERROR responses. They tell you why the API rejected the request.

error

Meaning Recovery

not_enough_balance

Insufficient funds Check balances, reduce trade amount

invalid_currency

Currency code not recognized Verify via coin search

invalid_quotation

Quote expired or already used Request a new quotation

failed_to_create_quotation

Quotation engine error Retry shortly

not_eligible_for_prime

Not eligible for Prime benefits Proceed without Prime

unauthorized

Account not approved for trading Contact support

restricted_feature

Feature restricted on account Report error_message to user

existing_currency_order_error

An existing order is in progress Wait or cancel existing order

viban_purchase_not_enabled

Fiat-to-crypto not enabled Account feature not available

crypto_viban_not_enabled

Crypto-to-fiat not enabled Account feature not available

bank_transfer_not_enabled

Bank transfer not enabled Account feature not available

missing_parameter

Required parameter missing Script bug — report it

failed_to_create_transaction

Transaction creation failed Retry or contact support

key_not_active

API key revoked or expired Generate a new API key, update env vars

api_key_not_found

Key doesn't exist or belongs to another user Verify correct key is set in CDC_API_KEY

For dynamic errors (limit exceeded, currency disabled, cooling-off, etc.), report the error and error_message directly to the user. For full details, see references/errors.md.

Logic & Rules

1. Asset & Source Disambiguation

Determine the trade type first:

• Purchase — fiat → crypto

• Sale — crypto → fiat

• Exchange — crypto → crypto

Then resolve the source wallet:

• For purchase: run npx tsx $SKILL_DIR/scripts/account.ts resolve-source purchase . The script returns only funded fiat entries.

• For sale or exchange: run npx tsx $SKILL_DIR/scripts/account.ts resolve-source sale (or exchange ). The script returns only funded crypto entries.

Result (from data.status ):

• SELECTED → auto-select data.currency .

• AMBIGUOUS → prompt user to choose from data.options .

• EMPTY → inform user "No funded wallets found" and stop.

"Sell All" Scenario: If user says "Sell all [TOKEN]", run npx tsx $SKILL_DIR/scripts/account.ts balance [TOKEN] . Use the data.available amount (or data.balance ) as from_amount for the quotation.

2. Trading Process (Quotation → Confirmation → Execution)

When the user asks to buy, sell, or swap crypto, always follow this three-step flow:

Step A — Get Quotation: Build the JSON params from the user's request (see the "Quotation JSON params" table in Trade Commands) and run: npx tsx $SKILL_DIR/scripts/trade.ts quote <type> '<json-params>'

Read data.id , data.from_amount , data.to_amount , and data.countdown from the response.

Step B — Ask User to Confirm:

• IF memory.confirmation_required is true (or unset):

• Prompt: "Confirm: {from_amount} for {to_amount}? Valid for {countdown}s. Reply 'YES' to proceed."

• Expiration Logic: If the user replies "YES" after countdown seconds have elapsed, reject: "Transaction rejected: The quotation rate has expired. Please request a new quote."

• Execute Step C ONLY if user replies "YES" within the valid window.

• ELSE (Opted Out):

• Notify: "Quotation received. Proceeding to execution automatically..."

• Immediately proceed to Step C.

Step C — Execute Order: Run: npx tsx $SKILL_DIR/scripts/trade.ts confirm <type> <data.id> using the id from Step A.

3. Memory Management (Opt-in/Out)

• To Opt-out: If user says "stop asking for confirmation" or "enable auto-trade", update memory.confirmation_required to false .

• To Opt-in: If user says "require confirmation" or "enable manual trade", update memory.confirmation_required to true .

• Platforms without persistent memory: If your platform does not support {{memory.*}} , treat confirmation_required as always true (safest default).

4. Error Handling

• All script outputs include an ok field. Success is defined ONLY as ok: true .

• If ok is false , read error and respond per the Error Handling table above.

• Never proceed to the next step after a failed command.

5. Account & History

• History: Run npx tsx $SKILL_DIR/scripts/trade.ts history — display the entries from data .

• Weekly Trading Limit: Run npx tsx $SKILL_DIR/scripts/account.ts trading-limit — display as: "📊 Weekly Trading Limit: {data.used} / {data.limit} USD (Remaining: {data.remaining} USD)".

• Balances (Categorized):

• If "List Fiat": run npx tsx $SKILL_DIR/scripts/account.ts balances fiat .

• If "List Crypto": run npx tsx $SKILL_DIR/scripts/account.ts balances crypto .

• If "List All": run npx tsx $SKILL_DIR/scripts/account.ts balances all . Crucial: Display Fiat category first, followed by Crypto balances below.

• The scripts automatically filter out zero-balance entries. If a category has no entries in the output, display "No holdings" under that header.

6. Kill Switch

• Trigger: User says "STOP ALL TRADING", "kill switch", or similar emergency stop command.

• ALWAYS require explicit confirmation regardless of memory.confirmation_required :

• Prompt: "⚠️ WARNING: This will immediately revoke your API key and disable all trading. A new API key must be generated to resume. Type 'CONFIRM KILL SWITCH' to proceed."

• Execute ONLY if user replies with the exact phrase.

• Execution: Run npx tsx $SKILL_DIR/scripts/account.ts revoke-key .

• On success (ok: true ): Notify: "🛑 Kill switch activated. API key has been revoked. All trading is disabled. Generate a new API key and update your environment variables to resume."

• On API_KEY_NOT_FOUND error: Notify: "API key not found — it may have already been revoked or does not exist."

• Idempotency: Revoking an already-revoked key is not an error; treat it the same as a successful revocation.

7. Balance Display Format

• Fiat Header: "🏦 Fiat Balances"

• Crypto Header: "🪙 Crypto Balances"

• Always list Fiat section before Crypto section when both are requested.

• Never display zero-balance assets. Only show assets with a balance greater than 0. If all assets in a category are zero, show "No holdings" under that header.